Structure and Optical Properties of Thermochromic Schiff Bases. Charge Transfer Interaction and Proton Transfer in the<i>N</i>-Tetrachlorosalicylideneaniline and<i>N</i>-Tetrachlorosalicylidene-1-pyrenylamine Crystals
作者:Tamotsu Inabe、Isabelle Gautier-Luneau、Naomi Hoshino、Kaoru Okaniwa、Hiroshi Okamoto、Tadaoki Mitani、Umpei Nagashima、Yusei Maruyama
DOI:10.1246/bcsj.64.801
日期:1991.3
Two kinds of N-salicylideneaniline derivatives, N-tetrachlorosalicylideneaniline (CL4SA) and N-tetrachlorosalicylidene-1-pyrenylamine (CL4SPY), have been prepared and subjected to structural and optical studies in the crystalline state. A thermochromic-type behavior of the former crystal has been observed as a shift of the absorption edge, while that of the latter crystal is much less pronounced. Fairly short O–H···N hydrogen bonds have been found in both compounds through crystallographic studies, which may be mainly due to a steric effect of chlorine substituents. The difference in the proton transfer behavior of CL4SA and CL4SPY should presumably be caused by an intermolecular charge-transfer interaction in the latter crystal.
两种N-水杨醛基苯胺衍生物,即N-四氯水杨醛基苯胺(CL4SA)和N-四氯水杨醛基-1-芘胺(CL4SPY),已经制备完成,并进行了晶体状态下的结构和光学研究。前者的晶体具有热致变色特性,表现为吸收边缘的移动,而后者的晶体则不那么明显。通过晶体学研究,在两种化合物中都发现了相当短的O-H·N氢键,这可能是由于氯取代基的空间位阻效应造成的。CL4SA和CL4SPY质子转移行为的不同,可能是由后者的晶体中的分子间电荷转移相互作用引起的。